CVE-2025-67843

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-12-19 · updated 2026-06-17
Weakness: CWE-1336

Description

A Server-Side Template Injection (SSTI) vulnerability in the MDX Rendering Engine in Mintlify Platform before 2025-11-15 allows remote attackers to execute arbitrary code via inline JSX expressions in an MDX file.

Affected products

Mintlify Platform: before 2025-11-15 — fixed in 2025-11-15

How to fix

Upgrade to a fixed version: Mintlify Platform 2025-11-15. Check the vendor advisory for mitigations.

References

https://kibty.town/blog/mintlify/
https://news.ycombinator.com/item?id=46317098
https://www.mintlify.com/blog/working-with-security-researchers-november-2025
https://www.mintlify.com/docs/changelog
https://kibty.town/blog/mintlify/

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